img {
  width: 100%;
  height: 450px; 
}

button.close {
  position: absolute;
  right: 10px;
  top: 10px;
  width: 40px;
  height: 40px;
  z-index: 111;
  font-size: 20px;
  background-color: #FFFF66;
  border-radius: 45px;
  opacity: 1;
}